Shuttle-box tension-controlling mechanism for looms



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SHUTTLE BOX TENSION CONTROLLING MECHANISM FOR LOOMS Filed Nov. 7. 1924 2Sheets-Sheet l 201%; was:

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WW w W 1 no nlnstraterl erohodiment Patented Ange 1'5, 1927c CLARE H.DRA'EEB, 01 HGIPEDALE, MASSACHUSETTS, ASSIGNGE f EQK EDALE fii'iill l'ljFACTUIRING COMPANY, 0F MILFORD, LEASSACHUSET'ES, A GGE'EQEATIGET TEEQQS-SACH'U SHUT-BOX TENSION-CONTROLLING MECHANISM Application filed November7, 1924;. Serial felo. 74833:)

fhe present invention relates to shuttle hox tension controllingmechanism for Weft replenishing: looms of the bobbin changing type.

i In looms of this type the positioning of the shuttle in the shuttlebox under the Weft replenishing: mechanism is of importance in order tosecure the etiicient and certain operation of the Weft replenishingmechaltl nism. I he shuttleis not required to have a precise position inregister With the Weft replenishing: mechanism as the inclined guide ofthe shuttle permits its being moved hr the hohhin or the movement of thehole- 15 hin hy it within the limits of the length of the guide. Inorder to facilitate such movements ofthe shuttle in order to cause it toadjust its position to the position of the hohhin presented to it by thetrensferrer,

29 it is proposed according to the present inrention to relieve thepressure on the hinders on the shuttle so as therehy to facilitate itsmovement under the influence of the pressure of the hohhin hntt eitherlengthwise of the lay or transversely thereto.

The ohiect of the invention, therefore, is to produce a'shnttle hoxtension controlling mechanism for looms or" the hohhin changing typehaving" provision "for relieving the shuttle tension duringreplenishment. To this end the invention oonsists in the constructionhereinafter described and particw lat-l7; defined in the claim.

t" scconmanying drawingsillustratin no in; the prererred "form or theinvention .i retire l is an elevation partly in section or a portion ors loom einhodying the features ot the present invention, the lsy heine;shown in approximately front center posi- 't'ion: Fienre 2 is adetnilthe hinder releasing device: Figure a plan View of the parts in frontcenter position; and Figure is so -Front elevation oi some oil the portsshown in Figure 3.

the invention descrihed coon-e" n with the shuttle hos tension controllg3 mechanism illustratedend descrihed in the application of JonisNorthrop filed August 12, 1924., i erial :l'o. 731,543.

The i us'trated enihodiment of the invention is deserihed as i ollowsrThe law 5 is supporte n sword 6 provided With the the dagger shalt 8 issupported on the lay in the usual manner and carries binder fingers 9and the dogger 10. Attached to the dagger shaft is the fork 11, onearrn12 of which has n hole in its end Which receives the lateral pin 13 ofthe tension rod 14. The lower end of the tension rod passes throughwhole in the collar 15 pivotelly mounted at 18 in a bracket 17v boltedto the frame 7B3 of the loom. A spring 19 on the lower end of the rodbelow the collar talres against such P collar at its upper end andagainst the adjusting not 20 at its lower end, heing secured in adjustedposition by the lock nut 21. The

spring 19 normally tends to pull upon the arm 12 and to turn the daggershaft 8 in a direction to cause the dagger to strike the steel 22 of thetree 23. This poll upon the tension rod 1 causes pressure to'he exertedupon the shuttle hinders 2 to cause proper tension to be exerted on theshnttle a's it enters the shuttle box.

The arni 12 also carries a spring stop 25 which is supported in an ear26 projected laterally from the arm 12. A spring 27 emhraces the shankof the stop taking" against the upper surface of the ear at its lowerend and against the head of the stop 25' at its upper end. The stop 25is orevided on the under side of the ear 2o ivith an adjusting not whichis secured in adiusted position hy the locking not 29, This stop 25 is adagger stop and serves to pre- "vent overthrow oi the hinders hy "theenterv1 d engage 3! ed jnstahly secured h holt 38 to creel:- et 329seen; cite a rearward proiection 3-0 from a po on oi the frame of looro.

'lhe'opcretion of the mechanism thus tar described, which is theconstrue ion illustrated and described in said lication is as s:mtarting with the in on the hack assuming shuttle he to the fork 11 andthereby turns the dagger contain a shuttle which presses upon the binder24 and thereby holds the binder finger 9 in rearward position, thedagger 10 will be held in raised position thereby during the forwardmovement of the lay. During such movement the by-pass pawl 32, as itadvances, comes into engagement with the surface of the cam 37. The pawlis turned to the right, as viewed in Fig. 1, stretching the spring 33,and the roll 36 rides up over.

the cam without any effect upon the position of the dagger, the by-passpawl yielding as it passes over the cam; After the by-pass pawl passesbeyond the cam, it snaps back to normal position under the influence ofits spring, so that at the end of the forward movement of the lay theby-pass pawl occupies its normal. position with respect to the fork uponwhich it is carried, as shown in full lin s in Fig. 1. During thisforward movement of the lay, the tension rod M pulls downwardly upon thefork l2 and thereby tends to turnv the dagger down into position toengage the frog. But inasmuch as the assumption is that a shuttleoccupies the box at this time, no turning movement is imparted to thedagger. During the backward movement of pawl 32 rides up over the cam 37and by reason of the engagement of the projection 34 therefrom, whichrests upon the upper surface of the arm 30 of the fork 11, it liftsshaft and relieves the binder of the pressure of the dagger fingersdurin the time the roll on the by-pass pawl is in engagement with thecam. This release of the pressure on the hinders due to the daggerfingers occurs at a time when. the shuttle is bein rod fork ll. As thelay retreats, the pres the lay the bypass masses sure exerted by thetension rod 14 on the dagger fingers increases, so that the shuttletension, that is to say, the pressure exerted by the binders on theshuttle as it entersthe box, increases from the time the tension isfirst applied all of the way back to back its lower position, and whilein this positionit does not engage the roller 41 of the fork 11.- Butwhen the change shaft isturned to lift the transfer latch so as to causereplenishment, the holder finger is'raised and upon the next forwardbeat of the lay the-cam roll 41 engages the surface of the holder finger42 and is thereby liftedso as to turn the dagger shaft 8 and withdrawthe fingers 9 from contact with the binder 24-. The binders preferablyhave a light spring for holding them with a small pressure against theshuttle so as to prevent accidental movement thereof. and when transferis called for, therefore, the binders are released from the heavypressure applied through the dagger shaft so that the shuttle is free tobe moved by the entering bobbin.

The present invention has beenshown in connection with the constructionillustrated in the said application, but it is to be understood that itmay be embodied in other forms within the scope of the claim. I

Having thus described the invention, what is claimed is: I

A weft replenishing loom of the bobbin changing type having, incombination, weft replenishing mechanism including a change shaft, a layhaving shuttle boxes provided with binders, a dagger rod on the lay,binder lingers on the dagger rod, a forwardly extended lever on thedagger rod, a rearwardly extended lever on the change shaft cooperat-Ell ing with the lever on the dagger shaft to turn the dagger shaft torelieve the pressure on the hinders-when the change shaft is operated tocause weft replenishment.

In testimony whereof l have signed my name to this specification.

